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I'm running Ubuntu 11.10 on Thinkpad X220.

Browsing through ThinkWiki pages I stumbled upon this information:

Multiple monitors

Configuring an extended desktop over two monitors led to malfunction. Side-by-side worked, one above the other did not.

In natty the solution was just to avoid the layouts that caused the malfunction.

The problems appear to have been completely solved in Ubuntu 11.10 (Oneiric Ocelot).

Has anyone of you managed to make X220 work with dual monitor setup? Does it require UltraBase? Any special tweaks or modifications?

Thanks for help!

share|improve this question
Apparently works good in 12.04. – radek Apr 26 '12 at 21:13
More info about UltraBase here & here. – radek Jun 13 '12 at 10:14
up vote 1 down vote accepted

My experience is different. With 11.04 it was a bit unstable. With 12.04, it works like a charm. (I never bothered with 11.10).

Try it.

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Thanks for feedback. Do you use ultrabase? Is it possible to connect two screens using ports of your laptop only? – radek May 4 '12 at 21:49
Yes, I use ultrabase. I will check the two external monitors on Sunday. I know it can do two external monitors with Windoze, so I do not expect a problem here. – Yossi Gil May 5 '12 at 11:20
Thanks for that! Do you use one DisplyPort and one VGA cable? Or are there other options with ultrabase? – radek May 5 '12 at 16:01
VGA+DisplayPort. I just need to find a display port cable. – Yossi Gil May 5 '12 at 18:44
I finally managed to connect two monitors, one with DisplayPort and another with VGA. It seems to work. I could not have both monitors work together with the tablet. But, the display went just fine. The machine suspended and recovered from suspended mode nicely, resuming the same configuration. Ubuntu 12.04 was also able to detect undocking and change the monitors configuration correctly. For some reason, I could find a hibernate menu option, so I could not test this. – Yossi Gil May 17 '12 at 6:40

It works but it is unstable. For example, it you hibernate with the dual display active and resume with just the laptop's screen it may be that you will get no display (actuallym, the display wil lbe full of useless vertical black and white lines). The only way to get out of this is to power cycle or remote ssh and reboot.

On other occasions, if the external screen was the main screen, you may end up having the lap top screen Ok but the Unity focus still on the external screen (which you unplug), thereby preventing you doing anything useful with the desktop. You cannot even reboot since you cannot clock on anything. Againm, the solution is to reboot or ssh remotetly.

I am using with both the ultrabase, at the office, and without at home.

share|improve this answer
Thanks for information. I think I could live without hibernation. Just one question - for the setup without ultrabase - how do you connect? One DisplayPort cable & one VGA? Or some adapter? – radek Dec 2 '11 at 18:43
Oups... I guess I read your original post too quickly, I did not realised tha tyour said 2 EXTERNAL monitors. I am using 1 external and the laptop screen. Sorry for the confusion. But even with my simpler setup it is not yet stable. Back your your original question; I did not try... sorry. – clauder Dec 4 '11 at 7:38

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